JP4066011B2 - Floor drain trap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor drain trap that is installed at a floor drain outlet for discharging drainage from, for example, a washing machine.
[0002]
[Prior art]
As this type of floor drain trap, for example, one disclosed in Japanese Patent Application Laid-Open No. 2002-4377 is known. This floor drain trap has a substantially cylindrical holding frame that is fitted to the upper end of a drain pipe (equipment drain pipe) connected to the floor drain outlet, and is held in a suspended manner by the holding frame in the drain pipe. A substantially bottomed cylindrical trap body having a drainage inlet, a drainage overflow outlet in the middle height of the peripheral wall, and a partition wall for forming a water seal part inside, and one end part of which is a drainage inlet of the trap body And a hose coupling having a drain hose connection port at the other end.
[0003]
According to the floor drain trap described above, the sewage odor is prevented from leaking into the space above the floor via the drain pipe due to the sealing water formed by the drainage collecting in the water sealing portion.
[0004]
[Problems to be solved by the invention]
By the way, in the drainage system of an apartment house, for example, the drainage in the lower floor is filled with water, and the upper floor drainage pipe is in a negative pressure state. May induce a so-called induction siphon phenomenon in which the water is attracted to the drain pipe and the sealed water is destroyed. Therefore, conventionally, a vent valve that introduces outside air when the inside of the drainage pipe is in a negative pressure state is provided at the upper end of the drainage stack to prevent the sealing of the floor drain trap.
[0005]
However, if multiple drainage pipes are connected to one drainage side branch pipe, the drainage side branch pipes accompany the drainage from the instrument drainage pipe connected to the upstream side of the drainage side branch pipe. The inside of the instrument drain pipe connected to the downstream side may be in a negative pressure state. In this case, the vent valve at the upper end of the drainage stack does not function sufficiently, and the sealed water in the drainage trap is destroyed. Therefore, in the above floor drain trap installed at the floor drain port, the sealed water may be destroyed due to the same induction siphon phenomenon.
[0006]
In the above floor drain trap, while the drainage from the washing machine, etc. is flowing, the portion around the trap body in the drain pipe is in a negative pressure state, and the drain in the floor drain trap is directed to the drain pipe side. There may be a so-called self-siphon phenomenon that is aspirated. When such a self-siphon phenomenon occurs, the air introduced into the floor drain trap together with the drainage is mixed into the drainage, and an unpleasant noise such as a gobogobo is generated or the flow of the drainage is deteriorated. there were.
[0007]
An object of the present invention is to provide a floor drain trap that does not cause destruction of sealed water and that can smoothly drain water from a washing machine or the like.
[0008]
[Means for Solving the Problems and Effects of the Invention]
A floor drain trap according to the present invention includes a cylindrical portion that is fitted and fixed to an upper end portion of a drain pipe connected to a floor drain port, a holding frame having a flange portion that is formed outward at the upper end of the cylindrical portion, In the pipe, it is held in a suspended manner on the cylindrical part of the holding frame, has a drainage inlet at the upper end, has a drainage outlet at the middle height of the peripheral wall, and has a partition wall for forming a water seal inside A substantially bottomed cylindrical trap body, a lid attached to the flange portion of the holding frame so as to cover the floor drain port, an inner end connected to the drain inlet of the trap body through the lid, and an outer end portion A hose coupling having a drain hose connection port, and at least one of the lid and the flange portion of the holding frame is provided with a vent hole, and the vent port is provided between the cylindrical portion of the holding frame and the trap body. A vertical communication part is provided to communicate with the inside of the drain pipe, On the side, in which the vent valve for introducing outside air is provided to open the vent when drainage pipe becomes a negative pressure state.
[0009]
In the above floor drain trap, when the pressure inside the drain pipe becomes negative due to the induction siphon phenomenon, the vent valve opens the vent and the outside air in the space above the floor is introduced into the drain pipe through the vent and the vertical communication section. Is done. As a result, the negative pressure in the drain pipe is eliminated, so that the sealing water is prevented from being destroyed.
[0010]
In addition, in the above floor drain trap, when the inside of the drain pipe becomes negative due to the self-siphon phenomenon during drainage, the outside air is introduced into the drain pipe in the same manner as described above, and the negative pressure in the drain pipe is eliminated. Is done. Therefore, there is no possibility that air enters the drainage and an unpleasant sound is generated or the flow of the drainage is deteriorated, and the drainage is performed smoothly.
[0011]
In the floor drain trap according to the present invention, the tip of the trap body has a plurality of outward projections formed at intervals in the circumferential direction at the upper part of the outer peripheral surface at the lower end of the inner peripheral surface of the cylindrical portion of the holding frame. By being engaged with the formed annular inward convex portion, the cylindrical portion is held in a suspended manner, and the vertical communication portion may be formed by a gap between adjacent outward projecting portions. .
[0012]
According to the said structure, since a trap main body can be easily taken out from the inside of a drain pipe only by pulling this up by hand, cleaning is easy. Further, since the vertical flow part for circulating the outside air is formed by the gap between the outward projecting parts of the trap body, the structure of the trap body is not complicated and the manufacture is easy.
[0013]
In the floor drain trap according to the present invention, the flange portion of the holding frame has an annular rising portion on its upper surface, and the rising portion has an annular inner wall rising from the upper surface of the flange portion, and a connecting portion obliquely upward around the inner wall. And an annular outer wall having an external thread on the outer peripheral surface, and the vent is formed by a plurality of through-holes spaced in the circumferential direction at the connecting portion of the rising portion, and the lid Is provided with a top wall having a through-hole in the center and a peripheral wall having a female screw extending downward from the outer peripheral edge of the top wall and screwed to the male screw of the rising portion on the inner peripheral surface. It is made of a flat annular body that has flexibility and is placed across the upper end of the inner wall and the outer wall of the rising part, the outer peripheral edge of which is the upper end of the outer wall of the rising part and the lower surface of the top wall of the lid May be pinched.
[0014]
According to the above configuration, the attachment and detachment of the lid to the flange portion of the holding frame can be easily performed with the screws, so that cleaning is easy. Moreover, despite the addition of the ventilation mechanism, the number of parts is not so large, the structure is simple, and the assembly is easy, so that a compact configuration can be achieved and the cost can be reduced. it can.
[0015]
In the above case, an annular groove may be formed in the upper end portion of the inner peripheral surface of the peripheral wall of the lid, and the outer peripheral edge of the vent valve may be fitted into the annular groove. In this way, since the vent valve can be integrated with the lid, the operation of assembling and disassembling the floor drain trap is further facilitated.
[0016]
In the above case, the hose joint is made of a soft resin, and has an outward flange portion that is brought into contact with the lower edge portion of the through hole of the top wall of the lid, and an inner flange that protrudes downward from the flange portion, and There may be a case where a fitting portion to be fitted into the drainage inlet is provided.
[0017]
If the hose joint is as described above, the flange portion provided at the inner end portion prevents the hose joint from being pulled upward, and seals between the through hole of the lid and the hose joint. . Moreover, since the fitting part provided in the inner end part of the soft resin hose joint is fitted into the drainage inlet of the trap body, the sealing performance of the same part can be ensured without using a separate sealing member.
[0018]
In the above case, the flange portion of the hose joint may be held between the upper end portion of the drain inlet of the trap body and the lower edge portion of the through hole of the top wall of the lid.
[0019]
According to the said structure, a hose coupling can be fixed more reliably and a sealing performance also improves.
[0020]
Furthermore, in the above case, a drooping cylinder portion that protrudes downward from the periphery of the lower edge portion of the through hole and is fitted over the drain inlet of the trap body may be formed on the top wall of the lid. This drooping cylinder part can more reliably prevent sewage odors from leaking between the through hole of the lid and the hose joint, and the trap body can be stabilized and positioned easily.
[0021]
Further, in the floor drain trap according to the present invention, an outwardly protruding water stop wall may be formed in the upper part of the drain overflow outlet in the peripheral wall of the trap body.
[0022]
If the trap body has the water blocking wall as described above, the drainage that has flowed into the drain pipe through the trap body does not leak out of the vent through the vertical communication portion.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show a first embodiment of the present invention. In these drawings, a floor drain trap (11) according to the present invention includes a holding frame (2), a trap body (3), a lid (4), and a hose joint (5).
[0024]
The holding frame (2) has a cylindrical part (21) fitted and fixed to the upper end of the drain pipe (P) connected to the floor drain (D), and outward from the upper end of the cylindrical part (21). And a flange portion (22) that extends. The cylindrical portion (21) is fixed to the upper end portion of the drain pipe (P) by, for example, bonding them together using an adhesive. The flange portion (22) covers the gap between the drain pipe (P) and the floor drain port (D) and is in contact with the peripheral edge portion of the floor drain port (D). The flange portion (22) has an annular rising portion (23) on the upper surface thereof. The rising portion (23) is provided via an annular inner wall (231) rising from the upper surface of the flange portion (22), and a connecting portion (233) obliquely above the periphery of the inner wall (231), and a male screw (232a ) Having an annular outer wall (232). As shown in FIGS. 1 and 2, the connecting portion (233) has an irregular leg trapezoidal shape in which the upper end surface thereof is an inverted frustoconical taper surface. The communication part (233) has a plurality of slit-shaped through holes (234) spaced in the circumferential direction so as to reach from the outer peripheral surface located below the outer wall (232) to the upper end surface.
[0025]
The trap body (3) has a substantially bottomed cylindrical shape, and is held in a suspended manner by the cylindrical portion (21) of the holding frame (2) in the drain pipe (P). The trap body (3) has a drainage inlet (31) at its upper end, a drainage overflow outlet (32) at the middle height of the peripheral wall, and a partition wall (33) for forming a water seal inside have. The peripheral wall of the trap body (3) includes a large-diameter trunk (3A), a small-diameter neck (3B), and a constriction (3C) positioned therebetween. The drainage inlet (31) is constituted by the neck (3B). An annular step (34) is formed between the neck (3B) and the constriction (3C) on the inner peripheral surface of the trap body (3). The drainage overflow outlet (32) is formed in a horizontal rectangular shape at a substantially right half of the upper end portion of the trunk portion (3A). The partition wall (33) extends obliquely downward from the upper right end of the trunk part (3A) toward the center of the trunk part (3A), and further downwards from here to near the bottom wall of the trap body (3). It is The partition wall (33) forms a U-shaped water seal (35) in the lower part of the trap body (3).
[0026]
The lid (4) is attached to the flange portion (22) of the holding frame (2) so as to cover the floor drain (D). The lid (4) includes a top wall (41) having a through-hole (411) in the center, and a male screw (23) extending from the outer peripheral edge of the top wall (41) downward to the inner peripheral surface (23). 232) and a peripheral wall (42) having a female screw (422) to be screwed.
[0027]
The hose joint (5) penetrates the lid (4) (in other words, is inserted into the through hole (411) of the top wall (41) of the lid (4)), and its inner end is connected to the trap body (3 ) Drainage inlet (31). A drain hose connection port (51) is provided at the outer end of the hose coupling (5). The hose joint (5) is of an elbow type, and is integrally formed of a soft resin such as an elastomer or a soft vinyl chloride resin. The inner end of the hose joint (5) is clamped between the upper end of the drainage inlet (31) of the trap body (3) and the lower edge (411a) of the through hole of the top wall (41) of the lid (4). An outward flange portion (52) and a fitting portion (53) projecting downward from the flange portion (52) and fitted into the drainage inlet (31) are provided. In addition, the through-hole lower edge part (411a) of the top wall (41) is protruded downward in a triangular cross section so that the flange part (52) can be easily clamped. The fitting portion (53) has a drooping cylindrical shape, and its tip is received by the annular step (34) in the trap body (3).
[0028]
The flange (22) of the holding frame (2) is provided with a vent (61) made of the through hole (234). Between the cylindrical part (21) of the holding frame (2) and the trap body (3), there is provided a vertical communication part (62) for communicating the vent (61) and the inside of the drain pipe (P). Yes. A vent valve (63) that opens the vent hole (61) and introduces outside air when the inside of the drain pipe (P) is in a negative pressure state is provided inside the vent hole (61).
[0029]
A plurality of outward projections (36) are formed at intervals in the circumferential direction on the outer peripheral surface of the trap body (3). An annular inward convex portion (24) is formed at the lower end portion of the inner peripheral surface of the cylindrical portion (21) of the holding frame (2). Then, the tips of the plurality of outward convex portions (36) are engaged with the annular inward convex portion (24), whereby the trap body (3) is held in a suspended shape by the holding frame (2). The vertical communication part (62) is formed by a gap between adjacent outward projections (36). The outward projection (36) is formed from the neck (3B) of the peripheral wall of the trap body (3) to the constriction (3C), and has a vertical plate shape as shown in FIGS. A notch (361) formed at the lower portion of the leading edge is engaged with the inward convex portion (24).
[0030]
The ventilation valve (63) is made of a flat annular body that is flexible and is placed on the upper end of the inner wall (231) and the outer wall (232) of the rising portion (23), and has an outer peripheral edge. The portion is clamped between the upper end portion of the outer wall (232) of the rising portion (23) and the lower surface of the top wall (41) of the lid (4). The vent valve (63) is integrally formed as a whole, for example, from an elastomer. A thin wall portion (631) is formed near the outer peripheral edge of the vent valve (63) so that the vent valve (63) is easily elastically deformed to open and close the vent port (61).
[0031]
The floor drain trap (11) can be installed at the floor drain port (D) as follows, for example. That is, first, the holding frame (2) is fitted and fixed to the upper end of the drain pipe (P). Next, the trap body (3) is inserted into the drain pipe (P). Then, the tip of the outward projection (36) of the trap body (3) is engaged with the inward projection (24) of the holding frame (2), and the trap body (3) is engaged with the holding frame (2). The cylindrical portion (21) is held in a suspended manner. The vent valve (63) is arranged on the upper end surface of the rising portion (23) of the holding frame (2), and the hose joint (5) is inserted into the through hole (411) of the lid (4) from below. Then, the female screw of the lid (4) is screwed into the male screw (232) of the rising portion (23) of the holding frame (2). As a result, the outer peripheral edge of the vent valve (63) is clamped between the lid (4) and the rising portion (23), and the flange (52) of the hose joint (5) is secured to the lid (4) and the trap body. (3) and the fitting portion (53) of the hose coupling (5) is fitted into the drainage inlet (31) of the trap body (3). By the simple operation as described above, the floor drain trap (11) is assembled and installed at the floor drain port (D). Further, when disassembling the floor drain trap (11), it is only necessary to perform the reverse operation to the above, and it is easy to clean the trap body (3) and the like.
[0032]
Next, the ventilation function of the floor drain trap (11) will be described with reference to FIGS.
[0033]
First, when no negative pressure is generated in the drain pipe (P), the floor drain trap (11) is in a state as shown in FIG. In other words, the vent valve (63) remains on the inner wall (231) and the upper end of the outer wall (232) of the rising portion (23), and the vent (61) is closed.
[0034]
On the other hand, when a negative pressure is generated in the drain pipe (P) due to the induction siphon phenomenon or the self-siphon phenomenon, the floor drain trap (11) is in a state as shown in FIG. That is, due to the pressure difference generated between the drain pipe (P) and the space above the floor, the inner peripheral edge of the vent valve (63) is separated from the upper end of the inner wall (231) of the rising portion (23), and the vent ( 61) opens. Thereby, the outside air in the space above the floor is introduced into the drain pipe (P) through the vent hole (61) and the vertical communication portion (62), and the negative pressure in the drain pipe (P) is eliminated. Therefore, the destruction of the sealed water due to the induction siphon phenomenon or the like is surely prevented, and the flow failure due to the self-siphon phenomenon during drainage does not occur.
[0035]
When the negative pressure in the drain pipe (P) is eliminated, the vent valve (63) is in the state shown in FIG. 1 due to its own weight, that is, the inner wall (231) and the outer wall (232) of the rising portion (23). Returning to the state of being placed across the upper end, the vent (61) is closed again. Therefore, there is no possibility that odor from sewage leaks through this vent hole (61).
[0036]
4 and 5 show a second embodiment of the present invention. This embodiment is substantially the same as the first embodiment shown in FIGS. 1 to 3 except for the following points. That is, in the floor drain trap (12) shown in FIGS. 4 and 5, the inner end of the soft resin hose joint (50) is attached to the flange (22) of the holding frame (2). The flange (54) of the hose joint (5) is pressed into the through hole (411) of the lid (4) from above so that the lower edge of the through hole (411) of the top wall (41) of the lid (4) The fitting portion (53) of the hose coupling (5) is fitted into the drainage inlet (31) of the trap body (3). Therefore, the flange part (54) of the hose joint (5) is considerably smaller than the flange part (52) shown in FIGS. An upper portion (55) of the flange portion (54) in the hose joint (5) has an outer diameter so as to be closely fitted into the through hole (411). At the center of the top wall (41) of the lid (4), a hanging cylinder (412) protrudes downward from the periphery of the lower edge of the through-hole (411) and fits over the drain inlet (31) of the trap body (3). ) Is formed. The flange part (54) is brought into contact with the inner peripheral surface of the upper end part of the hanging cylinder part (412). In the case of the hose coupling (5), the direction of the drainage hose connection port (51) can be changed without loosening the lid (4).
[0037]
A third embodiment of the present invention is shown in FIGS. This embodiment is substantially the same as the first embodiment shown in FIGS. 1 to 3 except for the following points. That is, in the floor drain trap (13) shown in FIGS. 6 to 8, the outwardly protruding water stop wall (37) is formed in the upper part of the drain overflow outlet (32) in the peripheral wall of the trap body (3). Has been. In this embodiment, the water blocking wall (37) is formed at the upper edge portion of the drainage overflow outlet (32), and the outer edge portion thereof is an annular inward convex of the cylindrical portion (21) of the holding frame (2). Part (24) has received. Therefore, the outer convex part (36X) located above the water blocking wall (37) has no equivalent to the notch (361) of the other outer convex part (36), and the water blocking wall (37) And integrated.
[0038]
The holding frame (2) is made of metal such as stainless steel or aluminum. The flange portion (22) of the holding frame (2) is provided with a plurality of through holes (221) for inserting screws for fixing the flange portion (22) to the floor surface. The rising portion (23) formed on the upper surface of the flange portion (22) has a connecting portion (233) having an inverted L-shaped cross section as shown in FIGS. The through hole (234) opened in the connecting portion (233) has a circular cross section.
[0039]
A plurality of knobs (413) are integrally formed on the top surface of the top wall (41) of the lid (4). The knobs (413) are vertical pieces that extend in the radial direction of the top wall (41), and are formed around the through holes (411) on the top surface of the top wall (41) at regular intervals in the circumferential direction. Has been. An annular groove (423) is formed at the upper end of the inner peripheral surface of the peripheral wall (42) of the lid (4), and the outer peripheral edge of the vent valve (63) is fitted into the annular groove (423).
[0040]
It should be noted that the above embodiment is merely an example, and it is of course possible to implement the present invention with appropriate modifications without departing from the scope of the present invention described in the claims.
[Brief description of the drawings]
FIG. 1 is a vertical longitudinal sectional view of a floor drain trap when a negative pressure is not generated in a drain pipe, showing a first embodiment of the present invention.
FIG. 2 is a vertical longitudinal sectional view of a floor drain trap when a negative pressure is generated in the drain pipe, showing the first embodiment of the present invention.
3 is an exploded perspective view showing the floor drain trap of FIGS. 1 and 2. FIG.
FIG. 4 is a vertical longitudinal sectional view of a floor drain trap when a negative pressure is not generated in the drain pipe, showing a second embodiment of the present invention.
FIG. 5 is a vertical longitudinal sectional view of a floor drain trap when a negative pressure is generated in a drain pipe, showing a second embodiment of the present invention.
FIG. 6 is a vertical longitudinal sectional view of a floor drain trap when a negative pressure is not generated in the drain pipe, showing a third embodiment of the present invention.
FIG. 7 shows a third embodiment of the present invention, and is a vertical longitudinal sectional view of a floor drain trap when negative pressure is generated in the drain pipe.
8 is an exploded perspective view of the floor drain trap of FIGS. 6 and 7. FIG.
[Explanation of symbols]
(D): Floor drain
(P): Drain pipe
(11) (12) (13): Floor drain trap
(2): Holding frame
(21): Cylindrical part
(22): Flange
(23): Rising part
(231): Inner wall
(232): Exterior wall
(232a): Male thread
(233): Connecting part
(234): Through hole
(24): Inward convex
(3): Trap body
(31): Drainage inlet
(32): Drainage overflow outlet
(33): Partition wall for water seal formation
(36): Outward convex
(4): Lid
(41): Top wall
(411): Through hole
(411a): Lower edge of through hole
(42): Perimeter wall
(422): Female thread
(5) (50): Hose fitting
(51): Drain hose connection port
(52) (54): Flange
(53): Insertion part
(61): Vent
(62): Vertical communication part
(63): Ventilation valve

Claims (5)

It has a cylindrical part (21) fitted and fixed to the upper end part of the drain pipe (P) connected to the floor drain port (D), and a flange part (22) extending outward from the upper end of the cylindrical part (21). Holding frame (2),
It is held in a suspended manner on the cylindrical part (21) of the holding frame (2), has a drainage inlet (31) at the upper end, has a drainage outlet (32) at the middle part of the peripheral wall, and has an internal A substantially bottomed tubular trap body (3) having a partition wall (33) for forming a water-sealed portion,
A lid (4) attached to the flange (22) of the holding frame (2) so as to cover the floor drain (D);
Hose fittings (5) (50) that pass through the lid (4), have an inner end connected to the drain inlet (31) of the trap body (3), and a drain hose connection port (51) at the outer end And
At least one of the lid (4) and the flange portion (22) of the holding frame (2) is provided with a vent (61), and the cylindrical portion (21) of the holding frame (2) and the trap body (3) A vertical communication part (62) is provided between the vent (61) and the drain pipe (P), and the drain pipe (P) is in a negative pressure state inside the vent (61). A floor drain trap, which is provided with a vent valve (63) that opens the vent (61) and introduces outside air. The trap body (3) has a plurality of outwardly projecting portions (36) formed on the outer peripheral surface thereof at intervals in the circumferential direction at the tips of the inner periphery of the cylindrical portion (21) of the holding frame (2). By being engaged with the annular inward convex portion (24) formed at the lower end portion of the surface, the cylindrical portion (21) is held in a suspended state,
The floor drainage trap according to claim 1, wherein the vertical communication portion (62) is formed by a gap between adjacent outward projections (36). The flange portion (22) of the holding frame (2) has an annular rising portion (23) on its upper surface, and the rising portion (23) has an annular inner wall (231) rising from the upper surface of the flange portion (22), An annular outer wall (232) provided via a connecting portion (233) obliquely above the inner wall (231) and having an external thread (232a) on the outer peripheral surface;
The vent (61) is formed by a plurality of through holes (234) spaced circumferentially in the connecting portion (233) of the rising portion (23),
The lid (4) has a top wall (41) having a through-hole (411) in the center, and extends downward from the outer peripheral edge of the top wall (41) and has an external thread (232a) A peripheral wall (42) having a female screw (422) screwed to
The ventilation valve (63) is made of a flat annular body that is flexible and is placed on the upper end of the inner wall (231) and the outer wall (232) of the rising portion (23), and has an outer peripheral edge. The floor drain trap according to claim 1 or 2, wherein the portion is clamped between the upper end portion of the outer wall (232) of the rising portion (23) and the lower surface of the top wall (41) of the lid (4). The hose joints (5) and (50) are made of a soft resin and have an outward flange that is brought into contact with the lower edge (411a) of the through hole of the top wall (41) of the lid (4) at the inner end thereof The floor drainage according to claim 3, further comprising a portion (52) (54) and a fitting portion (53) projecting downward from the flange portion (52) (54) and fitted into the drainage inlet (31). trap. The flange part (52) of the hose joint (5) is clamped between the upper end part of the drainage inlet (31) of the trap body (3) and the lower edge part (411a) of the through hole of the top wall (41) of the lid (4). The floor drain trap according to claim 4.

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